Pipe coupling



Aug. 11,1931. A. T. MCWANE 1,818,493

PIPE COUPLING Filed Sept. 24, '1929 2 Sheets-Sheet 1 ATTORNEYS k /////ls Patented Aug. 11, 1931 ARTHUR .1. MOW-AXE; OF BIRMINGHAM, ALABAMA PIPE courmim Application filed September 24, 1929. Serial No. 894,757.

This invention relates to pipe couplings of the gland and packing type, and, among other objects, aims to provlde important improvements in the coupling shown in my Patent No. 1,474,435, one of the main features being to simplif the construction and to make provision or removing and inserting the anchor bolts or holding means without disturbing or removing the packing gland.

Other aims and advantages of the invention will appear in the specification, when considered in connection with the accompanying drawings showing one illustrative embodiment thereof, and in which 2- Fig. 1 is a side elevation of the preferred design of pipe coupling applied to sections of bell and spigot pipes; Fig. 2 is a central, longitudinal sectional view of the coupling shown in Fig. 1;

Fig. 3 is a transverse sectional view on the line 3-3 of Fig. 1;

Fig. 4 is a longitudinal sectional view I showing the coupling before the anchor bolts are applied;

Fig. 5 is a side elevation of the preferred form of packin gland;

Fi 6 is a si e elevation of a rubber packinglring suitable for use in making the oint; an

Fig. 7 is a fragmentary sectional view of the coupling showing one of the anchor bolts about to be applied or removed.

Referrring particularly to the drawings, the coupling is there shown as being applied to'a ipe section 10 having a bell 11 which may be, and preferably is similar to that of an ordinary cast iron pipe section and the s igplh end of a pipe section 12, which is silo as being plain, is inserted in the bell 11. It is to be understood, however, that the coupling isequally applicable to fittings of this character and to pipe sections which have double bell ends and double spigot ends.

In this example, there is shown a packing seat 13, which is preferably tapered and formed near the bottom of the bell 11 and a suitable packing, such as a wedge-shaped rubber ring 14, is adapted to be inserted in the bell against this seat. A packing glad 15,

taken conveniently made of cast iron or other suitable metal, is adapted to be slipped over the spigot end of the pipe section 12 and is provided with a bolting flange 16 having a series of radial notches 17 to receive removable anchor bolts 18. Herein, the bolting flange has counterbores 19 about the bolt-receiving notches to accommodate cylindrical bosses 20 on the nuts 21 for the clamping bolts, so that the bolts are effectively interlocked with the flange and cannot slip loose.

As will be-seen in Figs. 2, 4 and 7, the bell is provided with an annular groove 22 conveniently formed near the mouth to receive toes 23 formed on the clamping bolts 18. To enable these clamping bolts to be inserted or removed from the gland without disturbing or removing the gland, the bolts are shown as having cam-shaped heel portions 24 adapted to be inserted in longitudinal slots 25 provided in the gland and terminating short of the packing end, the idea being to permit the bolts, after the n'uts'have been loosened to swing radially and thereb disengage the toes'23 from the annular V- liaped groove 22. Obviously, the bolts can easily be ap lied by inserting the toes in the grooves an swinging the shanks inwardly, the heels having a cam action against the spi' ot. In Fig. 7, one of the bolts is shown as eing a plied to orremoved from a coupling. he camshaped heels are shown as being roughened or knurled where they grip against the spigot. when the nuts aretightened to prevent the spigot from slipping relative to the bell. The upper face of the V-shaped groove Wedges the toes on the bolts inwardly so that the heels bite into the spigot. In this example, the lower end of the gland is shown as being tapered so as to fit in a V-shaped rubber packing ring (not shown) such as is common in this art. I

From the foregoing descriptiomit will be understood that the pac ing material, whether it be rubber, jute or other convenient packing, is seated in the bell and the packing gland is pushed in against the packing before the bolts are applied. Then the may be applied one at a time and their nuts screwed up until the cylindrical bosses thereon areinterlocked with the counterbores inbolts the flange 16. After all of the bolts are ap Y applied very quickly to bell an plied, they may be tightened b means of an ordinary wrench to compress t e packing as tightly as may be deemed advisable.

This ty fiof packing gland and the anchor bolts can made very cheapl and can be s igot pi w 1ch have no special bolting fl require more shipping space and also increase breakage. No special machine operations are required to form the packing seat andothe groovein the bell as these ma .be formed in the pipe casting. Further, t e coupling is very strong and is practically as efiective as combinations and sub-com inations.

'fittings of the character descri if the pipe sections have integral bolting in in combination, a substantiall cylindrlcal gland adapted to be slippe on the section having a be 1 nating spigot and inserted in the bell; a bolting notc es; packm material in the bell; and a plurality of anc or bolts adapted to be inserted in the mouth of the bell and interlocked therewith, said bolts havin rounded heel portions on which they may swung upon the spigot into said bolt-receiving notches.

2. A .pipe coupling of the character described compr1sing,-m combination, a pipe.

section presenting a bell having an annular groove ad'acent to its mouth and a acking seat; a spigot section within said ball; acking materialseated in said bell; a cylin rical Packmg serted wlthin the mouth of said bell; said gland havin a pluralit of longitudinal grooves ;-a b0 t receiving ange on said gland presentin a. lurality of radial notches and anchor b0 ts aving toe portions adapted to be inserted in said annular groove; said an-' cam-shaped heel chor bolts also presenting portions within said longitudinal grooves of the gland and arranged to be wedged against the spigot when the olts are tightened.

3. A pipe coupling of the character described comprisin in combination, a pipe and an annular substantiall -shaped groove adjacent to the mouth of e oove; a spigot section withinthe bell flin ing material seated in the bell about the spigot; a substantially cylindrical packing gland having a bolting flange; said gland presenting longitudinal grooves termishort of the ends thereof and radial bolt-receiving notches; and a plurality of anas chor bolts presenting toe portions and caman es t at g scribed comprising,

scribed, a

:rality of longitudinal-s flan e on said gland presenting bolt-receiving gland slipped over the spigot and in-- in bolting flange w the groove within said annular groove; and nuts shaped heel portions adapted to be inserted in saidbell y swingin action within said grooves, said cam-sha heel portions being roughened and adapted to be wedged against the spigot when said bolts are tightened to grip the spi 0t and prevent relative movement of the ll and spi ot sections.

4. A pipe coupling 1n combination, a bell section and a. spigot section, said bell section having a packing seat and an annular substantially V-shaped groove adjacent to its mouth; a .packing gland having a bolt-receiving flange and radial notches therein; a packing ring seated in the bell; and a lurality of anchor bolts having rounded eel portions bearing against the spigot and mterlocked with the bell bg swinging action; and nuts for said anchor olts having means interlocking with said bolt-receiving flange to prevent the bolts from sliding out of and notches.

5. In a i e coupling of the character dell havmg a packing seat and an annular groove arranged ad acent to the o the character dey I month of the bell; a packing gland adapted tobe slid on a spi t'to be inserted within said bell; said pac gland having a pluots; a bolt flange-having-radialbolt-receiving notches alined with and longitudinal slots; anchor bolts having toes adapted to engage said (groove within the bell; cam-shaped, roughene heel ortions on said anchor oltsadapted to sli e into the bell within said longitudinal slots, said boltsinto interlockin enadapted to be swung gagement with the bell and with said bo ting ange; and clamp' g nuts for said bolts resenting bosses, said boltin flange ha ing counterbores about said lt-reoe thereby prevent the anchor bolts from slidor swingin radially away from said en the-nuts are tightened.

6. In a of the character decoupling i scribed, alie ll having a wedge-she. d annular groove'therein; a packm glan adapted to be inserted withinsaid a series of longitudinal bolt-reoeivinglslots; a bolting flange on the packin gland avin bolt-receiving radial notches a ed with sai angitlllldinal ts(.)lots;rta.1 plurglittygdof anchor ts avin e onsa ap toengage g Po said bell; said anchor bolts also presenting cam-shaped heel porand presenting tions within said longitudinal slots; threaded 'ends on said anchor bolts adapted to be swung inwardly and radially into an ment with said notches in the bolting mg to cause said toe portions to interlock wi threaded on said anchor bolts having means interlocking with said bolting flange to prevent the bolts from swingingout of out with said. flange when e'nuts are tightened.

'vring 106 notches to receive said bosses on the nuts an 7. In a packed joint of the class described, a substantially cylindrical packing gland having a plurality of Ion itudinal slots; a flange on the outer end of said gland presenting radial notches alined with said slots; anchor bolts each having one end shaped to be inserted in the slots and the other ends with rounded heel portions on which the bolts are adapted to be swung into anchoring position with their shanks in said notches; and nuts threaded on said shanks adapted to engage said flange.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature.

ARTHUR T. MoWANE. 

